Clair



(No-Model.)

C@ A. MGGLAIR. STAMP APPET. No. 599,400. Patented Peb. 22, 1898. /1 N j, /s e Nf M@ JI/ C #y C %/Y f- SN: e EV ff t i \1' TN: mums Urns co. mofa-uma. wnsuwmou. n. c

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CHARLES ANDREW MCCLAIR, OF NORTH BROOKFIELD, CANADA, ASSIGNOR OF IWVO-TIIIRDS TO JOHN MOGUIRE, OF SAME PLACE, AND GARDNER CLISH, DUNCAN MCDONALD, AND SILAS R. TUPPER, OF TRURO, CANADA.

STAM PMTAPPET SPECIFICATION forming part of Letters Patent No. 599,400, dated February 22, 1898.

Application filed December 24,1896. Serial No. 616,959. (No model.)

To @ZZ whom t may concern,.-

Be it known that I, CHARLEs ANDREW Mc- CLAIR, a British subject, residing at North Brookiield, in the county of Queens, in the Province of Nova Scotia, Dominion of Canada, have invented a new and useful Improvement in Stamp-Tappets, of which the following is a specification.

My invention relates to the cylindrical- IO shaped pieces of castiron, commonly called tappets,77 which are secured to the stems of ore-crusl1er stamps and through which a vertical reciprocating motion is imparted to the stamps by the action of cams engaging with and disengaging from said tappets; and the object of my invention is to increase the durability of said cams by preserving a smooth, even, and comparatively soft wearing-surface on the tappet; also, to do away with the use of zo a lubricator on the cams, which is objectionable in gold-mills,I and, further, to decrease the noise caused when the iron surfaces of cams and tappets come in contact. I attain these objects by the device illustrated in the accompanying drawings, in which- Figure l is a vertical section of a stamptappet which embodies my invention complete. Fig. 2 is a vertical section of my attachment to the stamp-tappet alone. Fig 3 is a plan view of the same.

Similar letters and numerals referto similar parts throughout the several views.

In the drawings, A is the neck of the tappet.

B is the key-boss.

F is the face.

C is the bore through which the stamp-stem passes, onto which stem the tappet is secured by the keys o o, which keys, pressing against the gib f, draw the tappet firmly against and onto the stein.

CZ d are two metal bands shrunk on or other wise secured to the heads c c of the tappet and which project beyond the faces F F.

e e are metal rings about one-eighth of an inch thick, which are cast or otherwise formed or secured in the recesses c', formed in the tap pet-heads, and which project beyond the faces F F the same distance as do the bands d d. These rings are preferably made having the internaldiameterabout one`eighth of an inch larger than the stem, so as to allow of a clearance between them.

l 2 3 l 5 6 7 Sare pieces of hardwood boiled in oil, set on end, and pressed in place tightly, completely filling the space at each end of the tappet between the band CZ, the ring c, and the face E.

The cams by which the stamps are raised engaging with the wood-iilicd tappets, the noise which is connected with the use of iron tappets is largely reduced, the necessity for constant lubrication is removed, the life of a cani is greatly increased, and the necessity for chilled or hardened wearing parts is also done away with.

I do not claim that wood iillingis essential, as any equivalent may be used. Neither do I claim that the bands and the rings CZ d and c c made separate from the tappet are essential; but

Vhat `I do claim as new, and desire to secure by Letters Patent, is

A stamp-tappet consisting of the neck, having recesses o', formed in each of its ends, and shoulders formed upon its outer edges, combined with the rings d, e, applied to each end of the neck, and the filling-blocks of wood inserted between the rings, and forming bearing-surfaces for the tappet, substantially as shown.

CHARLES ANDREW MCCLAIR.

Witnesses:

D. F. MCADAMS, NEIL FRASER. 

